code: def test_proj_keys():
      assert len(crs.all_proj_keys) == 87
      assert "init" in crs.all_proj_keys
      assert "proj" in crs.all_proj_keys
      assert "no_mayo" in crs.all_proj_keys
  
file_path: Fiona/tests/test_crs.py
imports: import pytest
  from .conftest import requires_gdal33
  from fiona import crs
  from fiona.env import Env
  from fiona.errors import CRSError, FionaDeprecationWarning
label_desc: Use image node_id 1 for calling a global function with example usage: test_proj_keys() without return types